This updated and revised edition traces the development of multinational peacekeeping since the formation of the League of Nations, and reviews peacekeeping operations mandated by a wide range of international organizations and state coalitions. The work contains detailed entries on peacekeeping operations since 1920, including the 43 new peacekeeping operations mandated since the publication of the first edition; key military and civilian individuals involved in the operations; overviews of the political crises requiring intervention; the international organizations that have mandated the operations, specific events during the multinational missions; and the terminology associated with the topic. The book provides an insightful introduction to the subject, an up-to-date chronology, a comprehensive acronym list, an extensive bibliography, and examples of peacekeeping-related documents. The volume will serve the needs of students, scholars, diplomats, and others with an interest in deciphering the world of multinational peacekeeping. Readers will be able to cut through any confusion and gain a better understanding of the many military missions fielded by international organizations since 1920.